System Sensor SR This unit is exactly the same as my other System Sensor SR. Brand System SensorModel SRManufacturer System SensorType Alarm (Remote Strobe)
Simplex 4251-20 Category : SimplexI believe this is an older, less seen model of 4251-20. It has a slightly different handle from my other...
Grinnell TFX-912P Category : GrinnellJust like the rest of my Grinnell equipment, this smoke detector is from Brigham Young University.